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Manual – MOVI-PLC® advanced DHF41B DeviceNet and PROFIBUS DP-V1 Fieldbus Interfaces
11
Structure of the DP-V1 parameter channel
Functions of PROFIBUS DP-V1
11.3.5 PROFIdrive parameter orders
The PROFIdrive parameter channel of SEW inverters is directly mapped in the structure
of data set 47. Parameter access with PROFIdrive services usually takes place
according to the structure described below. The typical telegram sequence is used for
data set 47. PROFIdrive only defines the two request IDs
Request ID:0x01request parameter (PROFIdrive)
Request ID:0x02change parameter (PROFIdrive)
This means there is restricted data access in comparison with the MOVILINK
®
services.
Example for
reading a
parameter via
PROFIdrive
The following tables show an example of the structure of the WRITE.request and
READ.res user data for reading an individual parameter via the MOVILINK
®
parameter
channel.
Sending a parameter request
The following table shows the coding of the user data for the WRITE.req service
specifying the DP-V1 header. The WRITE.req service is used to transfer the parameter
setting request to the inverter.
TIP
The request ID = 0x02 = change parameter (PROFIdrive) results in remanent write
access to the selected parameter. Consequently, the internal flash/EEPROM of the
inverter is written with each write access. Use the MOVILINK
®
service "WRITE
Parameter volatile" if parameters must be written cyclically at short intervals. With this
service, you only alter the parameter values in the RAM of the inverter.
Service:
WRITE.request
Description
Slot_Number
0
Random, (is not evaluated)
Index
47
Index of the data set; constant index 47
Length
10
10 byte user data for parameter request
Service:
WRITE.request
Description
Slot_Number
0
Random, (is not evaluated)
Index
47
Index of the data set; constant index 47
Length
10
10 byte user data for parameter request
Byte
Field
Value
Description
0
Request reference
0x01
Individual reference number for the parameter set-
ting request is mirrored in the parameter response
1
Request ID
0x01
Request parameter (PROFIdrive)
2
Axis
0x01
Axis number; 1 = SBus address 1
3
No. of parameters
0x01
1 parameter
4
Attribute
0x10
Access to parameter value
5
No. of elements
0x00
0 = access to direct value, no subelement
6, 7
Parameter Number
0x206C
MOVILINK
®
index 8300 = "Firmware version"
8, 9
Subindex
0x0000
Subindex 0
0
0
I
Summary of Contents for DHF41B
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